Besides head gasket mixing oil and water what would cause for thetwo to mix 2001 montero sport 3.0

I had an oil leak coming from seems like cam shaft seal and had a mechanic look and determined it was the head gasket,but I didnt have any issues with any blown gasket,all I had was a oil leak,so we decided to do a whole head job,when all set and done noticed water and oil mixing,I want to know if it could be still the head gasket

I've been trying to gather information. So many different procedures. Disconnected battery to reset after repairs. Drove perfect at first but then began to sputter when on and off the gas. Then dies a...

Just replaced the timing belt on my 2000 mitsubishi montero 3.0 timing marks are dead
on number 1 piston is up, firing order is right but it still won't start, its tries but no go and
it cranks norm...